// MonoHotDraw. Diagramming Framework
//
// Authors:
//	Mario Carrión <mario@monouml.org>
//  Manuel Cerón <ceronman@gmail.com>
//
// Copyright (C) 2006, 2007, 2008, 2009 MonoUML Team (http://www.monouml.org)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

using System;
using System.Collections.Generic;
using MonoHotDraw.Figures;

namespace MonoHotDraw.Commands
{
	public class AbstractUndoActivity : IUndoActivity
	{
		public AbstractUndoActivity (IDrawingView drawingView)
		{
			DrawingView = drawingView;
		}
		
		#region Public Api
		public bool Undoable { get; set; }
		public bool Redoable { get; set; }
		public IDrawingView DrawingView { get; protected set; }
		public virtual IEnumerable<IFigure> AffectedFigures { get; set; }
		
		public virtual bool Undo ()
		{
			return Undoable; 
		}

		public virtual bool Redo ()
		{
			return Redoable;
		}

		public void Release ()
		{
			AffectedFigures = null;
		}
		#endregion 
	}
}
